Pendulum



No. 279,176. Patented June 12,1883.

mm mm.

(25265695. J if) oznrenm ran 5114.

elevation of our improved pendulum.

UNITED STATES FRANK A. MILLS AND THOMAS A PATENT. OFFICE.

. MOSSOP, OF PHILADELPHIA, PA.

COMPE'NSATING PENDULU'M.

SPECIFICATION forming part of Letters Patent No. 27,176, dated June 12, 1883,

' 7 Application filed June 8, 1882. (No model.)

To all 1071 0727, it may concern:

Be it known that we, FRANK. A. Mums and 'lnornrs A. Mossor, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented anew and useful Improvement in Compensating Pendulums, of which the 't'ol-, lowing is a specification.

The nature of our invention will be under stood by the following description and claims thereto appended.

In the accompanying drawings, which'make apart of this specification, Figure l. is a side Fig. 2 is a front elevation of the same. Fig. 3 is a bottom view with the ball G removed.

Like letters of reference in all the figures indicate the same parts.

The pendulum-rod is composed of two bars of different degrees of expansion and contrac tion to conipensate for the "variations of temperature; but, instead of having the two bars separated and connected together by means of cross-bars, they are held flat together by means of screws. The bars are of such form in their cross-section that when brought together they form a round, or hexagon, or octagon, or any other form of rod which may be desired. In the drawings they are half round and form a round rod,.the two flat sides beingbrought together.

The bar A is of steel, and the bar B of brass. They are held together to forma single red by means of screws a. The heads of the screws are countersunk in the brass bar and pass through the elongated holes inthe bar, the steel bar being tapped to receive the threaded ends of the screws. The countersinks in the brass bar are enlarged to unite with the enlargement of the holes in admitting such longitudinal movement of this bar over the steel bar as may be necessary during the expansion and contraction of the two bars. The lower end of the steel bar A has an elbow, c, to which is connected the horizontal lever C by means of the fulcrum-pin d. The

as to form two bearing-edges to come in 0011- tact with the disk to keep the latter steady.

G is the ball, having a screw-rod, 71, providedwith hooks i '1', which are connected with the pin j of the lever (l in line with the rod A 13, whereby to bring the vertical strain upon said rod at its central line.

The object of having the disk E adjustable on the rod I) is to admit of making the dis tanee between its bearing on the lever O and thefulcrum-pin (1 variable with the distance between said pin and pin j, upon which the ball G hung, :in adaptation to the diiierenoe in the degrees of expansion and contraction of the bars A and B.

It will readily be seen that by hanging the ball in line with the rod a much easier movement is 'given to the oscillations, and that the compactness of the rod gives simplicity thereto and very much improves its appearance, and likewise cheapens the constructi on o t' the pond uluin.

\Ve claim as our invention 1. In a leverage compensating pendulum, the combination of the ball G, having a rod, 71, provided with hooks i q", with the lever 0, having a pin, j, arranged in the central plane of the rod A 13, substantially in the manner and for the purpose set forth.

2. The rod of a compensating pendulum, having bars A B, of unequal expansion and contraction, and the bar A having screws (1, and the bar B slotted, substantially in the man ner and for the purpose set forth.

3. The combination of the screw-rod D,hav-

ing an adjustable disk,E, with the bar B, havbrass bar 13 is forked, leaving the part a straight,

ing legs 0 and a, the bull (1,]1nving :L red, It, provided with hooks i i, nndthe lever lmving a fillci'um-pin, (7, and pin j, substantially in the manner and for the purpose set ;l'o1-th, 4. In a compensating pendulum having its rod composed of bars A. and B, the combination of its lever (.2, having :1 fill('i'n1n- )in, (I,

with the bar A, having an elbow (1, provided with the fl'ilei'um-pin d, the elbow and barbeing in asinglepieee, snbstnntiallyns described.

5. in 1b rod of it compensating pendulum composed of bars A and B, the bar ,1 and its 

